p2646
Moderate
Acura · SUVs
Rocker Arm Oil Pressure Switch Open
Quick Answer
Error code P2646 on your Acura SUVs means: Rocker Arm Oil Pressure Switch Open. This is usually fixable — see the step-by-step guide below.
Affected Models
Likely Causes
How to Fix It
1
Check engine oil level and condition
2
Measure oil pressure with pressure gauge
3
Inspect oil pump for wear
4
Clean or flush oil passages
5
Replace oil pump or pressure switch if necessary
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
Parts You May Need
Engine oil
Oil pump
Oil pressure switch
Oil filter
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